docs: add folder filtering documentation

- Add path property to Available Properties section
- Update Value Inputs to mention folder selection dropdown
- Add comprehensive Folder-Based Filtering examples section
- Include practical use cases for filtering by folder location

docs/features/filtering-and-views.md

@@ -84,6 +84,8 @@ The filter builder allows incomplete conditions during construction:
 
 ### Selection Properties
 
+- `path` - Task file path/folder location
+
 - `status` - Task status (uses your configured statuses)
 - `priority` - Priority level (uses your configured priorities)
 - `tags` - Task tags
@@ -152,7 +154,7 @@ Natural language dates are resolved dynamically when filters are evaluated, maki
 The value input changes based on the selected property and operator:
 
 **Text Input**: For text properties and custom values
-**Dropdown Selection**: For status, priority, tags, contexts, and projects
+**Dropdown Selection**: For status, priority, tags, contexts, projects, and path (folder locations)
 **Date Input**: For date properties - supports both ISO dates and natural language
 **Number Input**: For numeric properties
 **No Input**: For existence operators that don't require values
@@ -312,4 +314,29 @@ Group with OR conjunction:
 - Condition 1: `projects` `contains` `[[Work Project]]`
 - Condition 2: `contexts` `is` `work`
 
+### Folder-Based Filtering
+
+Filter tasks by their location in your vault:
+
+**Tasks in a specific folder:**
+- Property: `path`
+- Operator: `contains`
+- Value: `Work/Projects` (shows tasks in the Work/Projects folder)
+
+**Tasks in vault root:**
+- Property: `path`
+- Operator: `contains`
+- Value: `(Root)` (shows tasks in the vault root directory)
+
+**Exclude tasks from specific folders:**
+- Property: `path`
+- Operator: `does-not-contain`
+- Value: `Archive` (hides tasks in Archive folders)
+
+**Tasks without folder structure:**
+- Property: `path`
+- Operator: `is-empty` (shows tasks with no folder path)
+
+The path dropdown automatically populates with all unique folder paths found in your vault, making it easy to select existing locations.
+
 This filtering system provides the flexibility to create simple quick filters or complex multi-criteria queries while maintaining good performance and user experience.